Supporting Bike While Changing Both Tyres

[sinto607276]

Best way for me is an easy rizer but guessing you don't have one

Another way is to take back wheel off first, then blocks of wood or such under the swing arm, then a toolbox or weight on back seat or bikerack/top box to bring the front end up but not too much then take off front and voila :thumbup
Obviously the reversal to put them back on